| 摘要 |
<p>A multifunctional non-return valve comprises a cylindrical tubular valve housing (1), inside which housing an annular valve seat (108) is provided which acts on a shut-off member (7) moving axially. The valve housing (1) comprises a baffle (5) in the shape of a conical cap on the further side from the valve seat (108) and fixed by means of radial fins (6), while the shut-off member (7) is positioned between the baffle (5) and the valve seat (108) and is of the cup type, having a cylindrical internal portion (107) and a conical or ogival end portion (207) that acts on the annular valve seat (108). Between the shut-off member (7) and the baffle (5), elastic means (15,16) may be provided which oppose any coming together of these components, or alternatively the shut-off member (7) may be replaced by a filter of essentially similar shape. <IMAGE></p> |
